Do the math: Senate could shift Republican in 2012

Less than 200 days before the November elections, Republicans are brimming with confidence about gaining at least the four seats they need to put the U.S. Senate in their column.

With 47 Republican senators and 53 Democrats, the number of seats up for election clearly point to the much-desired GOP net gain of four and then some. There are 35 Senate seats are up for grabs this fall, with 10 held by Republicans and 25 by the Democrats.